# GX_IsVBlank

## C Specification

      #include <nitro/gx/gx.h>

      s32 GX_IsVBlank();

## Description

This function determines whether the program is in V-Blank period. It returns a value other than 0 when in the V-Blank period; it returns 0 when not in the V-Blank period.

## Arguments

None

## Return Values

Not in V-Blank period (0), or in V-Blank period (other than 0).

## See Also

`GX_VBlankIntr`, `GX_IsHBlank`

## Revision History

01/19/2004 Initial Version